package com.example.netty.Groupchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class GroupChatServer {
    private int port; // 监听端口

    public GroupChatServer(int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {
        // 创建两个线程组
        NioEventLoopGroup bossGroup = new NioEventLoopGroup(1);
        NioEventLoopGroup workGroup = new NioEventLoopGroup();
        try {

            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            // 获取到 pipeline
                            ChannelPipeline pipeline = ch.pipeline();
                            // 向 pipeline 加入解码器
                            pipeline.addLast("decoder", new StringDecoder())
                                    .addLast("encoder", new StringEncoder())
                                    // 加入自己的业务处理 handler
                                    .addLast(new GropuChatServerHandler());
                        }
                    });
            System.out.println("netty 服务器启动");
            ChannelFuture channelFuture = b.bind(port).sync();

            // 监听关闭事件
            channelFuture.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workGroup.shutdownGracefully();
        }


    }

    public static void main(String[] args) throws InterruptedException {
        new GroupChatServer(7000).run();
    }
}
